xworm | 66906c62a5b1145d4f3983843932d9748cebb217567c7269cb01124a6e364de1

General

Target

XClient.exe
Size

35KB
MD5

2ceaef57fa6132c14c31ec9844f5922e
SHA1

9b067933b3acc2e481b6ef8643fca31a69eba014
SHA256

66906c62a5b1145d4f3983843932d9748cebb217567c7269cb01124a6e364de1
SHA512

e101b221c4e1545d69459fc17dc0c413d474850ceb28a3bced6d1d06e6777c9675218b43538d1a10c2e5935e40bface7e5adae912c6334cd4792f6aae65fe457
SSDEEP

768:zDMfF7zLKYs2Byj5MuddqLa9Fk9wfO/hh/q2i:zkF7HKYs/1hdtFk9wfO/TC2i

Score

10^/10

xworm persistence rat trojan

Malware Config

Extracted

Family

xworm

Version

5.0

C2

ensure-manual.gl.at.ply.gg:41199

Mutex

I2W6vt3IzLHnygeR

Attributes

Install_directory
%AppData%
install_file
dllhost.exe

aes.plain

Signatures

Detect Xworm Payload 2 IoCs

resource	yara_rule
behavioral1/memory/3924-1-0x00000000000A0000-0x00000000000B0000-memory.dmp	family_xworm
behavioral1/files/0x0028000000045050-11.dat	family_xworm

Xworm
Xworm is a remote access trojan written in C#.
trojan rat xworm
Xworm family
xworm

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-2319007114-3335580451-2147236418-1000\Control Panel\International\Geo\Nation	XClient.exe

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\dllhost.lnk	XClient.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\dllhost.lnk	XClient.exe

Executes dropped EXE 2 IoCs

pid	Process
2600	dllhost.exe
2520	dllhost.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-2319007114-3335580451-2147236418-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\dllhost = "C:\\Users\\Admin\\AppData\\Roaming\\dllhost.exe"	XClient.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence execution

Scheduled Task

T1053.005

pid	Process
4548	schtasks.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	3924	XClient.exe
Token: SeDebugPrivilege	2600	dllhost.exe
Token: SeDebugPrivilege	2520	dllhost.exe

Suspicious use of WriteProcessMemory 2 IoCs

description	pid	Process	procid_target
PID 3924 wrote to memory of 4548	3924	XClient.exe	86
PID 3924 wrote to memory of 4548	3924	XClient.exe	86

Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
persistence

Query Registry
T1012

C:\Users\Admin\AppData\Local\Temp\XClient.exe
"C:\Users\Admin\AppData\Local\Temp\XClient.exe"
1⤵
- Checks computer location settings
- Drops startup file
- Adds Run key to start application
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3924
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "dllhost" /tr "C:\Users\Admin\AppData\Roaming\dllhost.exe"
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:4548

C:\Users\Admin\AppData\Roaming\dllhost.exe
"C:\Users\Admin\AppData\Roaming\dllhost.exe"
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:2600

C:\Users\Admin\AppData\Roaming\dllhost.exe
"C:\Users\Admin\AppData\Roaming\dllhost.exe"
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:2520

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

2

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\dllhost.exe.log

Filesize
654B

MD5
11c6e74f0561678d2cf7fc075a6cc00c

SHA1
535ee79ba978554abcb98c566235805e7ea18490

SHA256
d39a78fabca39532fcb85ce908781a75132e1bd01cc50a3b290dd87127837d63

SHA512
32c63d67bf512b42e7f57f71287b354200126cb417ef9d869c72e0b9388a7c2f5e3b61f303f1353baa1bf482d0f17e06e23c9f50b2f1babd4d958b6da19c40b0

Download Submit
C:\Users\Admin\AppData\Roaming\dllhost.exe

Filesize
35KB

MD5
2ceaef57fa6132c14c31ec9844f5922e

SHA1
9b067933b3acc2e481b6ef8643fca31a69eba014

SHA256
66906c62a5b1145d4f3983843932d9748cebb217567c7269cb01124a6e364de1

SHA512
e101b221c4e1545d69459fc17dc0c413d474850ceb28a3bced6d1d06e6777c9675218b43538d1a10c2e5935e40bface7e5adae912c6334cd4792f6aae65fe457

Download Submit
memory/2600-12-0x00007FFEABC90000-0x00007FFEAC752000-memory.dmp

Filesize
10.8MB

Download
memory/2600-14-0x00007FFEABC90000-0x00007FFEAC752000-memory.dmp

Filesize
10.8MB

Download
memory/3924-0-0x00007FFEABC93000-0x00007FFEABC95000-memory.dmp

Filesize
8KB

Download
memory/3924-1-0x00000000000A0000-0x00000000000B0000-memory.dmp

Filesize
64KB

Download
memory/3924-6-0x00007FFEABC90000-0x00007FFEAC752000-memory.dmp

Filesize
10.8MB

Download
memory/3924-7-0x00007FFEABC93000-0x00007FFEABC95000-memory.dmp

Filesize
8KB

Download
memory/3924-8-0x000000001C110000-0x000000001C11C000-memory.dmp

Filesize
48KB

Download
memory/3924-9-0x00007FFEABC90000-0x00007FFEAC752000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads